GTTF: Add command-line switches for number of jobs and batch limit.

base/test/test_switches.h

Index: base/test/test_switches.h
diff --git a/base/test/test_switches.h b/base/test/test_switches.h
index 123d480790a751364e0c2b96f74c8bd038199aee..ea00a20238aaaef6d541b98b90ae3036ed6817c0 100644
--- a/base/test/test_switches.h
+++ b/base/test/test_switches.h
@@ -10,6 +10,8 @@ namespace switches {
 // All switches in alphabetical order. The switches should be documented
 // alongside the definition of their values in the .cc file.
 extern const char kTestLargeTimeout[];
+extern const char kTestLauncherBatchLimit[];
+extern const char kTestLauncherJobs[];
 extern const char kTestLauncherOutput[];
 extern const char kTestTinyTimeout[];
 extern const char kUiTestActionTimeout[];